Liquid-fuel-burning apparatus.



Patented Nov. 20, 1917.

2 SHEETS-SHEET I.

G. R. PIMLOTT. LIQUID FUELBURNING APPARATUS.v

APPLICATION FILED ZIAN22| 1916.

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W I TNESSES G'. R. PIMLOTT.

. LIQUID FUEL BURNING APPARATUS.

APPLlcATIoN man 1AN.22. 1916.

l1,247,147. Patented N0v.20,1917.

2 SHEETS-SHEET 2.

To all whom it may concern invrrn strauss' aman GEORGE 3; PIMLoTnbF MILL-` VALLEY,v CALIFORNIA.

LIQUID-FUEL-BURNING 'AlPIIELAiBiA'JJUS.. 'i

Appue'ation aiea January A22, 1916. `serial No.v 73,609.

Be it known that I, GEORGE R. Frauen', a., citizen of the United States, residing at the. town of Mill Valley, county of Marin,

StateA of California, (Whose post-oliice ad dress is Mill Valley), prays that' VLetters Patent may be granted to for theImprovements in Liquid-Fuel-Burning Alpparatus, of which the vfollowinguis a specification. Y

y The object of this invention is to provide v a'fuel oil burning apparatus in which the Y reservoir may be placed in any convenientv location, preferably below the circulating i pump equally adaptable .to the purpose.v

volume of fuel tov be consumed can be automatlcally regulated.

A further obJect is to generally improve apparatus of this nature and render 'it more practical, useful, reliable and commerciallyl of an oil-burning vapparatus constructed inA accordance with this rinvention and illustrated as applied to the lire box of a cook stove.

Fig. 2 is an enlarged detailedview in vertical cross-section of the fuel governing mechanism.

Fig. 3 is an enlarged detailed view of' the generator partly in cross section to show its external and internal contour. v

, Fig. 4 is a'longitudinal cross section of the spray nozzle.

In detail the construction illustrated the drawings includes the force pump 1 havingthe intake fuel 3, contained in the reservoir 4. vThe system so that all fuel WillldrainV back into the reservoir when the circulating system isi open. The pump 1l is indicated as a gear force pump,but there are many varieties ofv The pump is ldriven by the gear 5 on the drive shaft thereof and'meshed'tvith the pinion 6 on the shaft of the motor 7. The

pipe 2, submerged in the fuel elevated' by thev Apump 'discharges "Vinto-v non,I

Specification.cf Letters Patent. Patented Nov.; 20, 1917 i the feedrre 85. through the Valve aiuta:

overflow valve 10,r and returns to the reseri" voir through the voverflow pipefll", thus 'Conil' pleting the circuit of the circulating system. 'i Fuel is diverted into the "burner supply sys?"I tem by leaving" the valve 9 ope'n,andA par#-r tially closingjthe valve 10, restricting the low of fuel through the circulating system' and vdiverting a rportion,through the vgovernor.

rl`he governor includes a tubular chamber."- i

12 formedv by the tube 13 having its oppo site ends hermetically sealed in the heads 14 and 15 respectively. The'head 14jha's" the transverse 'passage 16, with ,the by-pass Mieming into the chamber 12, and theby-, l'

pass 18 communicating With the interior of: the pressure gage'l).v This gagev 19 'registers the pressure ofV the circulating -syst'ei'ny ahead of the valve 1510, by which the pres-i sui-eis regulated by vrestricting the overflow#V The governor floating valve20"`is confinedy Within the chamber 12, the upper end ofA the fioat is' tapered`l as at 21', and terminates'v in the spheroidal valve 22, adapted to. seat against the valve seat 23 provided in the head 14 surrounding the opening 17. Thel lower end of the float is provided with they spheroidal valve 24, seating upon thevalve seat 25 surrounding the discharge opening 26, leading to the feed pipe 27 controlled by the valve 28. The float is centrally guided. Within the chamber12 byv thev garters 29,' preferably formed of helical springs as illustrated and located near the top andnear' the bottom ofthe oat, and adapted to engage the inner walls ofthe tube 13 as lthe float rises and falls Within the chamber 12.` The spyheroidal shape of the valves 22" and 24 eause'them to hermetically engage their respective valve seats regardless of the angleU that the floatassurnes Within the tube 13. Thefioat'is provided with a small opening 30, through which liquid may be admitted until thelioat attains the same gravity as an equal 'volume of liquid in which it -lia'ngs This balance is most easily at-` suspended. l tained by submerging the iioat inthe liquid itself permitting the liquid "to enter' through the hole 30, then sealing the hole 30,' when the necessary amount of liquid 31V is'confined Within` the float, "the float then having no'independent tendency torise orxfall" With-3 inthe. liquid confined Within Vthe chamber 12.".`

I The fuel "in the pipe 27"'passesi into-"the f generating chamber 32 of the generator, from the top of which it escapes through the return bend tube to the spray nozzle 33,

illustrated in Fig. t. Particular attention is called to the shape of the generator. The interior of the annulus takes the form of an erator to the rim 36. The walls of the generator are preferably of uniform thickness,

therefore the interior chamber 32 has substantially the same contour as the exterior. The lug 40 is provided to receive the return bend of the spray nozzle 33, a similar lug being provided to receive the pipe 27.

The rim 36 of the generator is provided with the annular' shoulder All, to facilitate its suspension within the bottom of the down draft tube 42 that has an inturned flange to engage the shoulder 41. The application of the down draft tube to the generator will vary according to the particular application of the generator itself.V In F ig. l the upper annular flange 43 of the down draft tube engages a flanged opening in the top 44 of the stove.

Diiferent makes of stoves, or different applications of a burner constructed in accordance with this invention, call for variations in structure well within the spirit of this invention.

There are instances where it is desirable to operate the tube and the generator from the horizontal plane, instead of the vertical plane as illustrated. @ther occasions may require that the axis of the generator be vertical and that the axis of the down draft tube be at an angle thereto; such changes are well within the capacity of the ordinary mechanic.

The apparatus operates substantially as follows:

The fuel elevated by the pump l is divided by the valve l0, a portion overliowing through the pipe ll back to the reservoir. That portion diverted by the valve l0, passes down through the chamber 12 of the governor into the pipe 27, through the valve 28 into the generator, escaping through the nozzle 33 from which it drips on to the irregular mass of fire clay, lime or other non-combustible substance, such Vas 45, where it is lighted by a match or torch. The float 20vhaving no tendency to rest heavily on the valve seat 25. under normal conditions, enough fuel will always escape to fill manie? iow through the generator is controlled by. j

the valve 28. The first heat of the genera:

tor tends to vaporize the fuel therein;` The constantly increasing temperature of thej generator raises the vapor to the form of a gas, that becomes more 'and more lfinely. divided until a high state of gasification re'- sults at the point of maximumheat within the generator. rfhis rarefiedV gas blows through the nozzle 33 and ignites beyond the lower opening 34 of the generator. The blast of the fuel gas escaping from the nozzle 33 at the axial center of the generator ani` nulus and directed downwardly therethrough at a high velocity, creates an as-v pirating or suction effect within the down draft tube 42, carrying atmospheric air down through the tube and mixing it with` the gasified fuel, which it dilates to an enormous extent, raising the efficiency of cornbustion to the maximum point, below the generator. The atmospheric air rushing through the inside of the generator absorbs the heat radiated therefrom, serving` the double purpose of expanding the air and maintaining a normal temperature in the generator, preventing it burning out, because of the intense heat to which its exterior walls are subjected by the {iame emitted therefrom. The capacity of the generator being known, the size of the nozzle 33 is formed accordingly, within this limit the volume of atmospheric air drawn through the down draft tube automatically regulates itself, according to the volume of fuel gas emitted from the generator, whereby the manual control of the fuel regulates the iiame automatically with respect to the v01- ume of atmospheric air. rIhe restricted nozzle outlet creates a back pressure in the generator, causing the expanding gases to force the fuel back into the pipe 27, lifting the valve 24 from its seat, if the pressure within the generator is greater than the pressure within the circulating system. lf the pressure within the generator is equal to the pressiire within the circulating system, the float will hang suspended between the two valve seats 23 and 25. If. however, the pressure within the generator rises above the pressure within the circulating system, the back pressure through the pipe 27 will force the float upward until the valve 22 seats hermetically against the seat 23, pre-1 venting the income of any more fuel, until the confined fuel escapes through the nozzle and equalizes the pressure above and below the float. By this arrangement, the generator vis protected against any excessive pressure that might be generated by the pump, in supplying fuel faster than it could be converted at the generator. In the event of a stoppage at the nozzle, the flame would become extinguished through lack of fuel, the back pressure would be removed and the float would gently close the valve 24, because of the pressure on the circulating system. Should the nozzle then open or a break occur in the pipe line 27, the pressure in this line would be removed and the pressure of the circulating system on the float 20 would seat it hermetically iagainst the valve seat 25, preventing the escape of any more fuel than that confined Within the supply system below the valve 24, a vquantity too small to be dangerous. In the event of the stoppage of the'nozzle being but momentary, the substance 45 having become incandescent in the presence of the flame, would remain hot long enough to reignite the fuel when it began to flow again, thus removing the necessity of constant Watching of the apparatus during its operative period.

Should the pressure in the circulating system for any reason fail, the back pressure in the generator would force the float upward and hermetically close the valve 23 maintaining the pressure Within the cham-k ber 12, until the pressure Within the circulating system is restored, if its stoppage was but momentary or until the fuel is completely exhausted beneath the valve 22, thus maintaining the flame for a considerable period. The lioat 20 is extremely sensitive to pressure variations on veither side, that is to say, either in the circulating system or the generating system. If the main source of fuel supply fails, the governor` instantly traps that fuel confined Within the reservoir 12, supplying the generator during the emergency; on the other hand a failure in the generator causes the governor to cut 0H the fuel supply thereto. The pressure gage 19 registers the pressure on the circulating system and a similar gage 46 registers the pressure on the generating system, giving a visual check on these respective systems.

If a normal evenly burning fire is desired, the valve 10 can be opened and the excess of fuel permitted to fioW back to the reservoir. On the other hand, should a demand arise for an intense fire calling for a greater volume of fuel, the valve 10 can be restricted accordingly to divert the desired quantity of fuel through the governor to the generator, the volume of fiame being directly controlled by the valve 28.

It is obvious that there is no limit to size that this system of generation maybe built.

copies of this patent may be obtained for ve cents each. by addressing the Washingtcnamc.

By superheating a large generator commercial gas may be generated and ystored instead of directly consumed as illustrated; or liquids may be distilled or fractionated; or steam generated under lcontrol of thisA form of governor.

I claim:

l. An apparatus such as described including a reservoir; a burner connected With said reservoir; and a governor interposed between said reservoir and burner having a vertical chamber With top and bottom inlet and outlet openings, and a float yin said chamber having valves cooperating With said openings; said float being'of substantially the same gravity as the fuel in said chamber.

2. An apparatus such as described including a reservoir; a circulating system concirculating system; a vertical governor chamber connected with said circulating system and having top and bottom inlet and outlet openings, and a float in said chamber coperating With said openings; and a burner connected With the outlet from said chamber.

3. An apparatus such as described including a reservoir; a circulating system connected With said reservoir; a vertical governor'chamber connected with said circulating system and having top and bottom inlet and outlet openings, and a float valve in said chamber of substantially the same specific gravity as they fuel passing through said chamber and coperating with said openings, a spring'means in said outlet acting against said Hoat, a generator connected with the outlet of said chamber; and a nozzle connected with said generator and having a restricted opening.

l. An apparatus such as described including a.V reservoir; a circulating system connected with said reservoir; a vertical governor chamber connected With said circulating'system and having top and bottom inlet and outlet openings, and a float valve in said chamber of substantially the vsame specific gravity as the fuel passing through said chamber and coperating with said openings; a spring means in said outlet acting against said float, a'n annular generator connected with the outlet of said chamber;

Commissioner of Patents, 

